MBSS Site Summary for: CORS-102-S-2014

Site Photos

Field photo showing stream conditions at site CORS-102-S-2014-MidpointDownstream (Opens in a new window) Field photo showing stream conditions at site CORS-102-S-2014-MidpointUpstream (Opens in a new window)

Located on EMORY CREEK UT in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 3/13/2014 and again in the summer on 6/17/2014.

Index of Biotic Integrity (IBI) Results:

An Index of Biotic Integrity (IBI) is a scientific tool used to identify and classify stream health. An IBI associates anthropogenic influences on a stream or with biological condition in the stream, and is formulated using data developed from biosurveys.
Details on the development and application of MBSS IBIs are in this document.
Fish IBI Poor - 2.3 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 639 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3.9 %
Agricultural Land Use 11.1 %
Forested Land Use 84 %


Stream showing woody debris, logs, and rocky substrate.
An example of woody debris in a stream.

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 71 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 8 meters 		4/20 (Poor)
Shading 55 %
Embeddedness 85 %
The embeddedness, a measure of silt on the stream bottom, was 85%. This is relatively high, and may exclude some biota.


Stream Water Quality:
pH (lab) 6.6
Alkalinity
(acid neutralizing capacity) 		160 µeq/L
Dissolved organic carbon (DOC) 11.8344 mg/L

Biological Stream Condition:

Surveys of the organisms living within a stream can give indications of stream health. Species richness, or the number of different species present, as well as indicator species (species whose presence, absence or abundance can serve as a measure of environmental conditions) are informative for stream health. 		Close-up of a mayfly indicator species.

Fish Survey Results:
The following 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 133
Redfin Pickerel 11
American Eel 10
Green Sunfish 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Fowler's Toad
Northern Green Frog
Wood Frog

Crayfish:
Cambarus diogenes

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 51
Stegopterna Black Fly 25
Nemouridae Nemourid Stonefly 5
Leptophlebia Pronggilled Mayfly 5
Capniidae Small Winter Stonefly 5
Orthocladius Non-Biting Midges 4
Hydrobaenus Midge 4
Orthocladiinae Midge 2
Polypedilum Non-Biting Midges 2
Thienemannimyia Group Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Zavrelimyia Non-Biting Midges 1
Paraphaenocladius Non-Biting Midges 1
Cheumatopsyche Net-Spinning Caddisfly 1
Diplectrona Net-Spinning Caddisfly 1
Crangonyx Amphipod 1
Ceratopogonidae Biting Midge 1
Ameletus Combmouthed Minnow Mayfly 1
Pseudolimnophila Crane Fly 1
Tipula Crane Fly 1
Tipulidae Cranefly 1
Ptilostomis Giant Casemaker Caddisfly 1
Kick net sampling for macroinvertebrates.
Sampling with a kick net.

Information disclaimer: The information and data on this page is for guidance and general planning purposes only. It should not be used to make decisions on specific matters.